Receiver comprising a radiofrequency splitter

Abstract

A receiver comprises a radio frequency splitter and respective tuning elements, which are coupled to respective outputs of the radio frequency splitter One of these tuning elements has a control terminal coupled to receive a direct current control signal via a radio frequency-blocking circuit. A direct current path extends, via the radio frequency splitter, from the aforementioned control terminal to a control terminal of another tuning element.

1. A receiver comprising:
 a radiofrequency splitter; 
 respective tuning elements that are coupled to receive respective outputs of the radiofrequency splitter, one of the respective tuning elements having a control terminal coupled to receive a direct current control signal via a radiofrequency-blocking circuit; and 
 a direct current path that extends, via the radiofrequency splitter, from the aforementioned control terminal to a control terminal of another tuning element. 
 
     
     
       2. A receiver according to  claim 1 , the one and the other tuning element each comprising two control terminals, one being coupled to receive a coarse-tuning voltage, the other control terminal being coupled to receive a fine-tuning voltage. 
     
     
       3. A receiver according to  claim 2 , the fine-tuning voltage constituting the direct current control signal, which the direct current path transfers from the control terminal of the one tuning element to the control terminal of the other tuning element. 
     
     
       4. A multimedia system comprising a receiver according to  claim 1  for deriving a multimedia signal from a selected channel in a radiofrequency spectrum, and a rendering device for rendering the multimedia signal. 
     
     
       5. A receiver according to  claim 1 , further including a controller and memory, wherein the controller is configured and arranged to generate the direct current control signal based on correction data stored in the memory. 
     
     
       6. A receiver according to  claim 1 , wherein the direct current control signal is configured and arranged to reduce alignment errors between a higher VHF resonance circuit and a lower VHF resonance circuit of the radiofrequency splitter. 
     
     
       7. A receiver comprising:
 a radiofrequency splitter; 
 respective tuning elements that are coupled to respective outputs of the radiofrequency splitter, one of the respective tuning elements having a control terminal coupled to receive a direct current control signal via a radiofrequency-blocking circuit, each tuning element including two control terminals, one being coupled to receive a coarse-tuning voltage, the other control terminal being coupled to receive a fine-tuning voltage, and each tuning element being a tuning diode having a cathode coupled to receive the coarse-tuning voltage and an anode coupled to receive the fine-tuning voltage; and 
 a direct current path that extends, via the radiofrequency splitter, from the aforementioned control terminal to a control terminal of another tuning element. 
 
     
     
       8. A receiver comprising:
 a radiofrequency splitter; 
 respective tuning elements that are coupled to respective outputs of the radiofrequency splitter, one of the respective tuning elements having a control terminal coupled to receive a direct current control signal via a radiofrequency-blocking circuit; and 
 a direct current path that extends, via the radiofrequency splitter, from the aforementioned control terminal to a control terminal of another tuning element, the direct current path including a resistance coupled between an input and an output of the radiofrequency splitter; and an inductance coupled between the input of the radiofrequency splitter and another output of the radiofrequency splitter. 
 
     
     
       9. A receiver comprising:
 a radiofrequency splitter; 
 respective tuning elements that are coupled to respective outputs of the radiofrequency splitter, one of the respective tuning elements having a control terminal coupled to receive a direct current control signal via a radiofrequency-blocking circuit; and 
 a direct current path that extends, via the radiofrequency splitter, from the aforementioned control terminal to a control terminal of another tuning element, the respective tuning elements belonging to respective processing branches, which are coupled between the respective outputs of the radiofrequency splitter and a mixer-oscillator. 
 
     
     
       10. A receiver comprising:
 a radiofrequency splitter; 
 respective tuning elements that are coupled to respective outputs of the radiofrequency splitter, one of the respective tuning elements having a control terminal coupled to receive a direct current control signal via a radiofrequency-blocking circuit, each tuning element including two control terminals, one being coupled to receive a coarse-tuning voltage, the other control terminal being coupled to receive a fine-tuning voltage; 
 a direct current path that extends, via the radiofrequency splitter, from the aforementioned control terminal to a control terminal of another tuning element; 
 a tuning voltage generator for generating the coarse-tuning voltage on the basis of a tuning command, a reference frequency, and an oscillator frequency from a mixer-oscillator; and 
 a controller arranged to provide the fine-tuning voltage on the basis of correction data, which is stored in a memory. 
 
     
     
       11. A method of tuning a receiver that comprises:
 a radiofrequency splitter; 
 respective tuning elements, which are coupled to receive respective outputs of the radiofrequency splitter, one of the respective tuning elements having a control terminal coupled to receive a direct current control signal via a radiofrequency-blocking circuit; and 
 a direct current path that extends, via the radiofrequency splitter, from the aforementioned control terminal to a control terminal of another tuning element; 
 
       the method comprising the step of:
 controlling the respective tuning elements by applying the direct current control signal to the control terminal of the one tuning element. 
 
     
     
       12. A non-transitory medium computer program product for a programmable processor, the computer program product comprising a set of instructions that, when loaded into the programmable processor, causes the programmable processor to carry out the method according to  claim 11 .